Approximately 5% of all women in the world are HBsAg-positive. Chronic hepatitis B is a problem in women of reproductive age. This paper assessed 88 HBsAg-positive pregnant women, of whom 11 began treatment during pregnancy and five became pregnant while receiving treatment. The files of HBsAg-positive pregnant women were reviewed between January 2010 and December 2013 retrospectively. From these 88 pregnant women, 72 did not receive any treatment during their pregnancy, 11 began treatment during their pregnancy, and five became pregnant while receiving treatment. Nine of these 11 pregnant women were given tenofovir disoproxil fu- marate and two of them lamivudine. Ten babies of the 11 mothers that began treatment during their pregnancy were healthy, but one was lost due to preterm birth. Of the five patients who became pregnant while receiving treatment, the treatments of four women were discontinued and they were monitored during their pregnancies because mild-moderate (less than stage 3) fibrosis was found in their liver biopsy results. It is important to screen all pregnant women for hepatitis B and to assess those found HBsAg-positive. It is possible to protect both the mother and baby using appropriate approaches.